Typewriting mechanism



Dec. 8, 1942. s. BRAND TYPEWRITING MECHANISM 4 Filed Aug. 15, 1939 '2 sheets-sheet 1 /`v 222222711212), I Y L AT'ORNEY Dern s, 1942i. s, BRAND 2,304,439

TYPEWRITNG MECHNISM Filed Aug. 15, y1939 Sheets-Sheet 2 'A TTO RNEY Villustrated in the space from the i arm 5, which is pivoted other arm of the lever 5 is operatively connected Patented-Dec. s, i942 Samuel Brand, Bingham International Business ton, N. Y., assigner to Machines Corporation,

New York, N. Y., a corporation of New York Application August 15,1539, Serial N0. 290,277

- claims. (C1. isi- 66) This invention relates to improvements in typewriting machines, and the principal object of the invention is the provision of a device for initiat ing an operation of the carriage return mechanism by the operation' of a type bar operating mechanism.

-Another object of the inventionis the provsion of means for printing a symbol and initiatc ing a carriage returnv operation bythe depresv,

sion of a single key. l

Other objects of the invention will be pointed out in the following description and claims and 4 accompanying drawings, which disclose, byfway of example, the principle of the 4 invention and the best mode, which has been contemplated, of applying that principle.

In the drawings: c Fig. 1 is a fragmentary section through the typewriter.

Fig. 2 is a detailed view of the symbol type bar operating cam and the carriage return cam.

Fig. 3 is a plan View of the power drive roller land the type bar and carriage return cams.

4--l, Fig. 2,v

Fig. 4 is a section taken on line and showing the carriage return voperating cam. Fig. 5 is a fragmentary front illustration` of Y the power devices foricontrolling and driving the carriage return mechanism.

Fig. 6l is al fragmentary rear elevation of the machine showing the carriage return.

Fig. '1 is a modified form of the mechanism shown in Fig. 2.

Fig. 8 illustrates the offset type to provide a last character in the line.

the drawings, the invention is shown applied to a power driven typewriter of a well-known type, although its use is not limited to such machines. The illustrated machine includes a type bar l, (Figs. 1 and 8) carrying types 2, and being pivoted in a type basket 3 (Fig. l) vfor movement to and from printing engagement with a platen l. A toggle lever 5 pivoted to the type barhas one `arm pivoted,to a toggle Referring to to one arm of a bell crank 1 by means. of a link 8. The bell crank 1 ispivotally mounted on a common pivot rod 8a and is resiliently retained in its normal positicnwith the type bar'r'etracted by a spring 8. The other arm of the bell to a fixed part. Thev crank 1 is connected with an arm of a power operated lever -II by a link I2. The other arm of the lever Il projects downwardly adjacent a power driven roller I3 and carries a cam I4 rotatably mounted thereon.

' the machine.

The cam Il is normally out of engagement with the power driven roller, but is resiliently urged into engagement therewith by a spring pressed arm l5 pivotally carried by the lever II and engaging a projection I6 on the cam. A stop I1 on the lower end of a lever I8 pivotally mounted on the lever II engages a projection I9 on the 'cam I4, thus holding the cam against the action ofthe spring pressed arm 5.

At its upper end the lever I8 carries a projection which is straddled by the lower end of an arm 20 projecting downwardly from a key lever 2| pivoted on the rod 8a. The key lever 2l carries at its free end a key 22, whereby it4 may be manually operated.

lOperation of the key 22 rocks the lever I8 to withdraw the stop I1 from the projection I9, whereupon a spring pressed arm I5 rocks the cam I4 into contact with the periphery of the power driven roller I3. The cam is then rotated by the roller and swings the` lever II pivoted on a rod IIa to actuate the bell crank 1, which swings the type bar I into engagement with the platen. L c

A key controlled power driven means is provided for returning" the carriage against the action of the usual spring drum (not shown) to begin a new line. This means includes the power roller I3 with which cooperates a key controlled cam 23 of the usual well-known construction. The cam 23 ismounted on a lever 24 .(Fig. 4),

one arm of which is connected bya link 25 toV one end of a toggle lever 28 (Fig. 5) pivotally mounted on a bracket 21 fixed on the frame of through an opening `in the frame and is connected at its outer end to oneend of a toggle link 28, the other-end of which is connected to a rod 29 adjustably mounted in the upper end of a. yoke 38 loosely mounted on a stud 3l projecting 'from the frame of the machine.

The parts are normally in their position as shown in Fig. 5, but upon depression of the carriage return key 32 a lever 38 releases the cam 23, which is moved into engagement with the power roller I3 and` isV actuated in a well-known manner to straighten the toggle 26-28,which through the yoke 30 controls a rclutch member 33, mounted on the shaft 33 of the power roller yI3 adjacent a spool 35 freely -mounted on the shaft 34. A tape 36 is wound onthe spool 35 and has one of its ends secured to the core of said spool. The other end of tape 36 passes over a pulley (not showni arranged on the frame end of the carriage guideway and at The toggle lever 25-'projects inoperative y e c its other end is engaged with a hook 31 projecting from the carriage. Y j

The clutch member 33 is mounted to rotate with the shaft 34 and is movable axially thereon into engagement with the spool 35 to connect said spool to the shaft so that it may be driven thereby. 'I'his engagement of the clutch member 33 with the spool 35jis effected by straightening of the toggle 26-28 as set forth above and the tape is thus wound on the spool to return the carriage to begin a new line. The construction of the clutch is clearly disclosed in Patent No. 1,753,450, granted April 8, 1930, to Russell G. Thompson, to which reference may be had for complete description thereof.

It is sometimes desirable to insure the printing of a symbol on the end of a typed line, for instance, in certain types of justification it is essential to sense the length of each line to determine the amount of justification required. This sensing is facilitated by printing a symbol or mark at the end of the line which may be more accurately sensed than the last printed letter or figure.

One ofthe important features of the instant invention, therefore, is the provision of the following described device to automatically print such a symbol and initiate a carriage return action by the depression of a` single key.

The levers Il and 24 which carry the cams id and 2'3 respectively are mounted adjacent each other on the rod lla. A stud 39 (Figs. 2 and 3) on the lever Ii which carries the symbol cam I cooperates with an. ear 60 projecting from the lever 38 associated with the carriage return cam 23. Referring to Fig. 3 it can be seen that with the cams I4 and 23 in their normally .latched' positions there is a space between the stud 39 and ear 40.

As set forth above, depression of the symbol key 22 releases the cam i4, which, upon coming into contact with the power roller i3, is operated to throw the symbol type bar against the platen 4 to make the impression. Justbefore the type bar, completes -its printing stroke, the stud 39 engages the ear 40 actuating the lever 38 to`release the carriage return cam 23. This cam coming into contact with the power roller I3 is then actuated to operate the carriage return clutch in the manner above described.

. depression of a single key,

The symbol key 22 and the carriage return key may be rigidly connected as illustrated to 32 operate as a unit, or the key 22 and its corresponding key stem may be omitted, in which case the operator,` when the end of a line is reached, depresses the carriage return key 32, which effects an operation of the symbol-type bar and initiates a carriage return action.

Obviously the carriage return key 32 and its stem may be eliminated and the operator, upon reaching the end of a line, may depress the symbolkey 22 with the same result.

Also, the carriage return key 32 may be arranged as shown in Fig. 7 to trip its cam :23 independently of the symbol key 22, by which arrangement the symbol may 'be' printed and the carriage returned in timed relation by manual namely the symbol key 22, and the carriage may ently ofthe symbol key without printing the syml bol by depressing the carriage return key.

While there has been shown and described and pointed out the fundamenta-l novel features of the invention as applied to a single modification it will be understood that various omissions and substitutions and changes in the form and debe returned independtails of the device illustratedand in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

W'hat is claimed is:

1. `In a typewriting machine, the combination of a frame, a carriage movable transversely thereon, a type bar, a lever connected with said type bar, a power roller, a cam element carried by said lever and capable of engagement with the power roller, key controlled means for effecting the engagement of the cam element with the power roller to cause movement of the lever to actuate the type bar, power operated means to move the carriage to begin a new line, and means carried by said lever for effecting an operation of the power operated means upon movement of said lever during the actuation of the type bar.

2. In a typewriting machine, the combination of a frame, a carriage movable thereon, a type bar, a lever connected with said type bar, a power driven roller, a cam carried by said lever and movable into engagement with the roller for imparting movement to the lever to actuate the type bar, key controlled means to control the engagement of said cam with said roller, carriage return means, a lever connected to said carriage return means, a second cam carried by the latter lever and movable into engagement with the roller to 'eifect operation of said carriage return means, andmeans carried by the rst mentioned lever `to control the engagement of the second cam with the roller upon engagement of the first mentioned cam' with said roller.

3. In atypewriting machine, the combination of a frame, a carriage movable thereon, a type sheet, power means bar, a power driven roller, a cam and a carrier for said cam, the carrier being connected to the type bar, means biasing said cam toward engagement with the power roller, a latch normally holding said cam out of such engagement, key controlled means to operate said latch to release the cam for engagement with the aforesaid roller to cause movement of the carrier for effecting operation of the type bar, carriage return means, a second cam, and means normally biasing the second cam into engagement with the power roller, a carrier for said second cam having conner Lion with said carriage return means for operation of the latter means upon engagement of the second cam with the roller, a latch associatedwith said second cam for normally holding 'the latter cam out of such engagement, and a projection on the carrier for the first mentioned cam for actuating the second mentioned latch upon engagement of the first mentioned cam with the power roller.

4. In a machine of the class described, recording elements, a power operatondevices having linkage connection with the recording elements and being engageable with the power operator for operating said elements to effect recording on a sheet, selectively operable means for causing said devicesto engage the power operator for operation thereby, a carriage for the record to return said carriage, an element having linkage connection with said carriage return means and being engageable with .the power operator for causing operation of the carriage return means, a latch nbrmally restraining said element fromsuch engagement, and means carried by the linkage connection of one o f said devices and actuated upon operation of said device by the powa@` operator to release the engageable element from the latch for engagement with the power operator.

5. In a machine of the class described, type elements, a power operator, a plurality of cams engageable with the power operator; a carrier for each of said cams, each carrier having a connection withone of said type elements for operating the type element to print on a record sheet upon the engagement ofthe associated cam with said operator; key controlled means for selecting said cams for engagement with the power operator, a carriage for the record sheet, power means to return said carriage, another cam engageable with the power operator; a carrier for the latter caml said last named carrier having a vconnection with the carriage return mans to effect operation of the power carriage return means upon engagement of said latter cam with the power operator; .and means on the carrier for one of the irst mentioned cams and actuated upon operation of said cam by the power operator to cause the cam related to the carriage return means to also engage the power operator.

SAMUEL BRAND. 

